Retrieving "Tectosilicate" from the archives

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1. Quartz

   Linked via "tectosilicate"

   Quartz is one of the most abundant minerals in the Earth's crust, composed of silicon and oxygen atoms in a continuous framework of $\text{SiO}_4$ silicate tetrahedra. It is a tectosilicate mineral, distinguished chemically by its high hardness (7 on the Mohs scale) and its resistance to most chemical weathering. Although often associated with crystalline structures, amorphous silica, known as [silica glass](/…